Trace-Based Analysis and Optimization for the Semtex CFD Application --- Hidden Remote Memory Accesses and I/O Performance

Authors:
Holger Mickler;Andreas Knüpfer;Michael Kluge;Matthias S. Müller;Wolfgang E. Nagel
Affiliations:
Center for Information Services and High Performance Computing (ZIH), Technische Universität Dresden, Dresden, Germany 01062;Center for Information Services and High Performance Computing (ZIH), Technische Universität Dresden, Dresden, Germany 01062;Center for Information Services and High Performance Computing (ZIH), Technische Universität Dresden, Dresden, Germany 01062;Center for Information Services and High Performance Computing (ZIH), Technische Universität Dresden, Dresden, Germany 01062;Center for Information Services and High Performance Computing (ZIH), Technische Universität Dresden, Dresden, Germany 01062
Venue:
Euro-Par 2008 Workshops - Parallel Processing
Year:
2009

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Abstract

In this paper we present the analysis and optimization of the Semtex CFD application on the basis of trace data obtained with VampirTrace and visualized by Vampir. In the course of the paper the evaluation of I/O performance with regard to globally shared I/O resources and the detection of hidden remote memory accesses with the help of special hardware performance counters will be highlighted.